Sultanganj is a city located in the Bhagalpur district of the Indian state of Bihar. It is situated on the south bank of Ganga river, 25 km west of Bhagalpur city at 25°14'23"N 86°43'48"E. Sultanganj is a position of ancient artifact. It is generally connected with the sage Jahnu, whose ashram was a focal point of learning and culture. Jahnu Muni's ashram was situated on the stone extending out of the bed of the Ganga River. Presently the site has the Shiva sanctuary of Ajgaivinath, otherwise called Gaibinath Mahadeo. The story is that the waterway Ganga on her way to the sea intruded on the Muni in hismeditation by the surge of her streams.
The sage gulped the stream in a swallow. Bhagiratha mediated and the Muni again let her out by making an entry point in his thigh. That is the reason the stream Ganga is additionally called Jahnavi. Generally Sultanganj shaped a piece of the immense Anga, State. In the times of the Mahabharata, Karna, the 6th sibling of the five Pandavas, administered in Anga. The capital of Anga was Champa. Champa is the present Champanagar arranged three miles toward the west of Bhagalpur. Lord Karna had his mansions at Champa present day Champanagar and Jahnugiri current Sultanganj. At present Champanagar, the-site of Karnas stronghold, is outstanding as Karnagarh. Karnagarh is for all intents and purposes a piece of Bhagalpur town now.